Graphite purifying device and method

Abstract

The invention discloses a graphite purifying device and a graphite purifying method, and relates to the field of metallurgical graphite purification. The graphite purifying device comprises a low-temperature reactive ion gas generator, a fluidized bed reactor, a product collector, a high-temperature heating zone and a gas-solid separator; a graphite raw material runs through a heat exchange pipe inside the product collector and then enters the fluidized bed reactor, reactive ion gas is ionized by the low-temperature reactive ion gas generator, enters the fluidized bed reactor and reacts with impurities in the raw material graphite, waste gas enters a waste gas recycling device through the gas-solid separator and is purified, and inert gas is discharged from the waste gas recycling device and is reused; meanwhile, graphite in the gas-solid separator enters the high-temperature heating zone for high-temperature purification; the graphite after the high-temperature purification enters theproduct collector and exchanges heat with the raw material graphite. Through adoption of a low-temperature reactive ion gas and fluidized bed combined technology, low-energy consumption, low-pollution and low-cost clean graphite smelting purification is achieved.

Description

technical field [0001] The invention relates to the field of metallurgical graphite purification, in particular to a graphite purification device and method. Background technique [0002] Graphite resources have been listed as key raw materials by many countries and play an extremely important role in the development of industry and national economy. Scientific planning and orderly development are important prerequisites to ensure the sustainable development of the graphite industry and form good economic and social benefits. The purification of graphite is the basis for the preparation of all graphite materials and is a common problem in the development of graphite materials. Existing graphite purification methods include: (1) alkali-acid method, which can obtain graphite products with a fixed carbon content of more than 99%, but the pollution is serious; (2) hydrofluoric acid method or mixed acid method, such methods can Obtain graphite with a purity of 99.9%, but hydrof...

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Problems solved by technology

Although this patent can achieve the purpose of high-temperature purification, it is still not energy-saving enough, and the emission of impurity gases will cause a certain degree of environmental pollution

[0004] Chinese patent CN103172060B discloses the use of a closed long cylinder inclined from high to low in sections as the main body of high-temperature purification. The long cylinder is divided into feeding area, feeding buffer zone, low-temperature The heating zone, medium temperature heating zone, high temperature heating zone, clinker buffer zone and cooling and cooling discharge zone can produce 99%, 99.9%, 99.99% high-purity microcrystalline graphite powder, and a by-product recovery device is designed, but its purification temperature is 2700 ℃, can not achieve low temperature, low energy consumption

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